![nasas webb investigates eternal sunrises sunsets on distant world](https://utterbuzz.com/wp-content/uploads/2024/07/nasas-webb-investigates-eternal-sunrises-sunsets-on-distant-world-640x419.png)
Researchers using NASA’s James Webb Space Telescope have finally confirmed what models have previously predicted: An exoplanet has differences between its eternal morning and eternal evening atmosphere. WASP-39 b, a giant planet with a diameter 1.3 times greater than Jupiter, but similar mass to Saturn that orbits a star about 700 light-years away from Earth, is tidally locked to its parent star. This means it has a constant dayside and a constant nightside — one side of the planet is always exposed to its star, while the other is always shrouded in darkness.